摘要
以采空区下11~#煤层辅助运输顺槽为研究对象,通过对巷道顶板结构特征、围岩强度特性、上部煤层残留煤柱集中应力对开采煤层顶板造成的破坏深度进行分析,结合锚杆支护理论,并对巷道围岩锚固特性进行现场试验,提出了以高预应力锚杆为基础,配用"短锚索+工字钢棚"联合支护方式,根据顶板条件的差异性,分别采用3种支护方案。
Researched the subsidiary transportation of l lth coal seam under the goal and deeply analyzed the structural characteristics of roadway roof,strength of surrounding rock ,fracture depth of mining coal seam roof induced by stress concentration of residual pillar in upper coal seam, combined with bolt support theory and field test of anchorage characteristics of surrounding rock, proposed united support method called ＂short anchor cable ＋ joist shed＂ with high prestressed anchor,and according to the difference of roof condition adopted three projects.
作者
白志飞
BAI Zhi-fei(China Coal Pingshuo Group Company Limited, Shuozhou 036006, Chin)
出处
《煤炭技术》
CAS
2018年第6期64-66,共3页
Coal Technology
